/*
 * DynamicReports - Free Java reporting library for creating reports dynamically
 *
 * Copyright (C) 2010 - 2018 Ricardo Mariaca and the Dynamic Reports Contributors
 *
 * This file is part of DynamicReports.
 *
 * DynamicReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DynamicReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with DynamicReports. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.dynamicreports.examples.subtotal;

import net.sf.dynamicreports.examples.Templates;
import net.sf.dynamicreports.report.builder.column.TextColumnBuilder;
import net.sf.dynamicreports.report.builder.subtotal.AggregationSubtotalBuilder;
import net.sf.dynamicreports.report.datasource.DRDataSource;
import net.sf.dynamicreports.report.exception.DRException;
import net.sf.jasperreports.engine.JRDataSource;

import java.math.BigDecimal;
import java.util.Calendar;
import java.util.Date;

import static net.sf.dynamicreports.report.builder.DynamicReports.col;
import static net.sf.dynamicreports.report.builder.DynamicReports.report;
import static net.sf.dynamicreports.report.builder.DynamicReports.sbt;
import static net.sf.dynamicreports.report.builder.DynamicReports.type;

/**
 * <p>AggregationSubtotalReport class.</p>
 *
 * @author Ricardo Mariaca
 * 
 */
public class AggregationSubtotalReport {

    /**
     * <p>Constructor for AggregationSubtotalReport.</p>
     */
    public AggregationSubtotalReport() {
        build();
    }

    /**
     * <p>main.</p>
     *
     * @param args an array of {@link String} objects.
     */
    public static void main(String[] args) {
        new AggregationSubtotalReport();
    }

    private void build() {
        TextColumnBuilder<String> itemColumn = col.column("Item", "item", type.stringType());
        TextColumnBuilder<Date> orderDateColumn = col.column("Order Date", "orderdate", type.dateType());
        TextColumnBuilder<Integer> quantityColumn = col.column("Quantity", "quantity", type.integerType());
        TextColumnBuilder<BigDecimal> unitPriceColumn = col.column("Unit price", "unitprice", type.bigDecimalType());

        AggregationSubtotalBuilder<Long> itemCount = sbt.count(itemColumn).setLabel("count");
        AggregationSubtotalBuilder<Long> itemDistCount = sbt.distinctCount(itemColumn).setLabel("distinct count");
        AggregationSubtotalBuilder<BigDecimal> itemSum = sbt.sum(unitPriceColumn).setLabel("unit price sum").setShowInColumn(itemColumn);

        AggregationSubtotalBuilder<Long> orderDateCount = sbt.count(orderDateColumn).setLabel("count");
        AggregationSubtotalBuilder<Long> orderDateDistCount = sbt.distinctCount(orderDateColumn).setLabel("distinct count");
        AggregationSubtotalBuilder<Date> orderDateMin = sbt.min(orderDateColumn).setLabel("min value");
        AggregationSubtotalBuilder<Date> orderDateMax = sbt.max(orderDateColumn).setLabel("max value");

        AggregationSubtotalBuilder<Integer> quantitySum = sbt.sum(quantityColumn).setLabel("sum");
        AggregationSubtotalBuilder<Number> quantityAvg = sbt.avg(quantityColumn).setLabel("avg");
        AggregationSubtotalBuilder<Long> quantityCount = sbt.count(quantityColumn).setLabel("count");
        AggregationSubtotalBuilder<Long> quantityDistCount = sbt.distinctCount(quantityColumn).setLabel("distinct count");
        AggregationSubtotalBuilder<Integer> quantityMin = sbt.min(quantityColumn).setLabel("min value");
        AggregationSubtotalBuilder<Integer> quantityMax = sbt.max(quantityColumn).setLabel("max value");

        AggregationSubtotalBuilder<BigDecimal> unitPriceSum = sbt.sum(unitPriceColumn).setLabel("sum");
        AggregationSubtotalBuilder<Number> unitPriceAvg = sbt.avg(unitPriceColumn).setLabel("avg");
        AggregationSubtotalBuilder<Long> unitPriceCount = sbt.count(unitPriceColumn).setLabel("count");
        AggregationSubtotalBuilder<Long> unitPriceDistCount = sbt.distinctCount(unitPriceColumn).setLabel("distinct count");
        AggregationSubtotalBuilder<BigDecimal> unitPriceFirst = sbt.first(unitPriceColumn).setLabel("first value");
        AggregationSubtotalBuilder<Number> unitPriceStdDev = sbt.stdDev(unitPriceColumn).setLabel("standard deviation");
        AggregationSubtotalBuilder<Number> unitPriceVar = sbt.var(unitPriceColumn).setLabel("variance");

        try {
            report().setTemplate(Templates.reportTemplate)
                    .columns(itemColumn, orderDateColumn, quantityColumn, unitPriceColumn)
                    .subtotalsAtSummary(itemSum, itemCount, itemDistCount, orderDateCount, orderDateDistCount, orderDateMin, orderDateMax, quantitySum, quantityAvg, quantityCount, quantityDistCount,
                                        quantityMin, quantityMax, unitPriceSum, unitPriceAvg, unitPriceCount, unitPriceDistCount, unitPriceFirst, unitPriceStdDev, unitPriceVar)
                    .title(Templates.createTitleComponent("AggregationSubtotal"))
                    .pageFooter(Templates.footerComponent)
                    .setDataSource(createDataSource())
                    .show();
        } catch (DRException e) {
            e.printStackTrace();
        }
    }

    private JRDataSource createDataSource() {
        DRDataSource dataSource = new DRDataSource("item", "orderdate", "quantity", "unitprice");
        dataSource.add("Tablet", toDate(2010, 1, 1), 3, BigDecimal.valueOf(110));
        dataSource.add("Tablet", toDate(2010, 2, 1), 1, BigDecimal.valueOf(150));
        dataSource.add("Laptop", toDate(2010, 2, 1), 3, BigDecimal.valueOf(300));
        dataSource.add("Smartphone", toDate(2010, 4, 1), 8, BigDecimal.valueOf(90));
        dataSource.add("Smartphone", toDate(2010, 5, 1), 6, BigDecimal.valueOf(120));
        return dataSource;
    }

    private Date toDate(int year, int month, int day) {
        Calendar c = Calendar.getInstance();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month - 1);
        c.set(Calendar.DAY_OF_MONTH, day);
        return c.getTime();
    }
}
